TOA Electronics TDX2 User Manual
Page 15
15
distance (System Sub-menu) and is adjustable in 2.6
µ
S steps (1mm), or in 0.8mm
(or 0.003 feet) steps.
Alternatively, to convert from units of time (i.e. milliseconds) to units of distance
use the following formula, or change the input method in ‘delay time/distance’ in the
System Sub-Menu.
1 millisecond = 343mm (1.126ft) @ 20°C (68°F)
or to calculate time delay for a known distance, use:
Time delay = Distance in meters
20.06 x
√
(273+
°
C)
Were
°
C is the temperature in
°
C.
Or to simplify this equation at 20
°
C.
Delay time in milliseconds = Distance in meters x 2.192.
Or delay time in milliseconds = Distance in feet x 0.955
(N.B. Centigrade = (Fahrenheit –32) x 0.5555.